Furnace-front and valve mechanism therefor



- J. REID.

FURNACE FRONT AND VALVE MECHANISM THEREFOR APPLICATION HLED NOV. 2.191a.

1,333,732. I Patented Mar. 16, 1920.

2 SHEETS-SHEET I.

km N/GJTKOFQDAC 25 bm y 1 Nflkamey i J. REID.

FURNACE FRONT AND VALVE MECHANISM THEREFOR. APPLICATION mwnov. 2,.191

Pat-entd Malt-l6, 1920.

v 2 SHEETS-SHEET 2- I. mm 3.311),, on NEW Yemen.

Tacit whom mag 'concern." r aB'ezit known that I, JOHN REID, ja subjectof the King of Great Britain, and residing at 30Church street, in thecity ofNew York,

"in the State of New Yorlq i'n the United v States=of America, haveinvented new, and

' useful' Improvements in Furnace-Fronts and passage door.

Valve Mechanism Therefor, of which the following is the specification.

The'inven-tion relates toimprovements in 'furnace fronts and valvemechan sm there-" for, as :(lBSOI'lbBd n the present specification andshown in the accompanying drawings that form part-of the same; I

, The invention consists essentially Of2th6 '.novel: means employed,whereby efficient 1 operation 'ofthe valve mechanism is maintained andwhereby-r valves operate coincidently with the movements of the feed Theobjects of the invention arel to furnish smoothand uninterruptedoperation of the air and draft system in marine and other furnaces-toinsure the accessibility of the iceable, durable and parts andtheir-convenient manipulation by the attendant; to assemble thecomponent pieces, so as to standardizethe whole with. the furnacefront,to eliminate the-danger incident-to certain draft' conditions andopen feed door and generally to provide aserveasily operable valvemechanism.

In the drawings, Figural. is an'elevation of the back plate showing thefuel passage and ash pit flare in cross section and a plan 7 of thevalves and operating gear. I

Fig. 2 is' an enlarged detail of. the valve plate and fastener partsshowing the crank wlugs as'part of the latter and the connect- 12 rodbroken aw y;

Fig. 3'is an enlarged longitudi al Sea-m1 detail of the parts operatedby the valve 2 handle. and the connecting rod the latter squared shaftshowingthe crank and conbroken away. o I

.Fig; 4 's a cross sectional detail of the meeting rod, thelatter-broken away.

- Fig. 5 is an elevation ofthe furnace front 1 plate, showing thelatchibar of the fuel passage door and .the jstop operatedcoincidentlywith thevalve handle. f Like; numerals of reference indicate cor-' dresponding partsin' each figure Referringto the drawings, the frontplate fuel o ening 8. i

URZfifACE-EEBONT VALYEMEQH REFOR.

specification of L cttersjPatcnt. V Patented Mar; 1 6, "Applicationfiled November? i "1918. Serial m. 260,883.

The ash pit opening 2 communicates with .the furnacefproper' through thepassage, 5

and acorrespondingopening in the back Platefi. I

terminates at the fuel opening plates, and has suitable outletsthroughsaid back plateljThe fuel passage. is surrounded by thewall'i'and the air passage Shy the.

walls. Thexash pit fla-re completes the main frame of the furnace front,though I the precise construction is'inot necessary for the successfuloperation of this invention] The' catch 9' is formed adjacent to the.door opening 10at one endthereof and the hinge members 11 at the otherend. f'

The door '12 with corresponding hinge members 13 is heldto the hingemembers '1 I,

by the rod l land closes the door open ing 10. V

The latch'hbar 15 is secured to the center" of the door 12'by the pivot16 and is-adapted to lock in the catch 9 and beyond said catch Pu poses.1: 1

is formed'iinto the hook ofi'set 17 for opening-" The stop-18 is securedto,-or forms'iparto with the square shaft I 9,-, the latterter-minating'inythe threaded end'20. The bushing 21 having a square holecorresponding to the shaft 19 is mounted thereon and journaled in theorifice'22 i'n the front plate 1 adjacent to the latch bar 15, so thatin turning; the stop 18 moves over and beyond theend of thelatch bar 15.

lever {section 24 with a square orifice 25 corresponding to the squareshaft 19' and is V The "handle 23 isformed iat theendofits 7Theleversection 24: 'tr a'vels over an arcshaped track 26, at ea'ch' endof which are the stops 27 and 28 said trackand said stopsbeing'preferably cast with the front plate 1. p The crank 29'is mounted'on said square pivot bearings. e The nut 31 is mounted on the threadedend 20 and the spiral spring 32 encircles the shaft 19 inside the frontplate 1 which it l V abuts, and has the forked, end 30 forming shaft19between the nut 31 and the crank 4 29,-consequently the shaft 19 isconstantly drawn inwardly, which maintains the bushing in its journalingand keeps the valve handl'e close to "the front 1. f ,p I

The connecting rod 33 is p lly s c d i reference to the" drawin in theforked end 30 of the crank 29 and is formed with the turnbuckle Theshaft 35 is journaled beneath the dooropening 3 and extends through theair passages 8 and carries the plates 36 and 37 forming valves which arerigidly secured to said shaft. V

In securing the plate 36" to the shaft the block 38, longitudinallygrooved at 39 to receive the shaft, is placed against the underside ofthe plate-36',andthe cover plate against the upper'side immediately oversaid block 38, so that the bolt holes 40:: are

--in alinement with the boltholes- 4L The bolts 42- are thenwinsertedthrough cover plate 39, valveplate 3i6and block. 38,.en-

gagingthe shaft 35 in, the grooves 43, and

are fastened by the nuts 44;

A similar block 451 a is placed against the bottom of the plate 37andis. held-by the bolts 46 also engaging grooves 4'? in the shaft:and"extending'through the cover plate 48, said cover plate 48 havingthe-parallel lugs 51 and 52 forming pivot bearingsfor thelcwcr-endwofthe connecting rod 33.

The valve plates 36 and 37 are further secured to the shaft 3-5 by theU-bolts53 and. nuts 54, said bolts extending through the clainpingplates55 a In the operation of this invention, the valve plates as showncontrol the flow of air to the fire box, otherwise the draft forstimulating: the fire and bringing the fuel to astate of incandescence.'These plates, being fixed to the shaft as shown and the latterjournaled so as to project through the air-passages, shut off the saidpassages, when turned to an oblique position against the walls. 40

' The connectingrod attached to the crank formed by the valve fastenercoverwith the parallel lugs is operated by the movement ,ofthevalve-handle traveling; over the areshaped traplr' on the; furnacefront; The swinging of this handle to one end of the track the valvesand to theothcr end opens the valves, as. willreadily-be seenbv V andthedeta d description of the parts he ,einbefore.

The swingingqof'thezhiandle isaccompani-ed by the rotation ofthe stopthe r latch and in turning the crank shaft for clos ng the valves; thestop moves away from said latch leaving the door free to open,but-"so-long; asthe'valves' are in their open; Positions, the stop will,stayin front of the latch bar and frustrate-"any attempt p n the-doom te efore no tongue of tl'anae will reach out of the/furnace door 7opening, which isa great protection to the stokers, berause 1f thedraftwas Inamta ned during; the door opening-act, the chances are i the.stolrenwonlt be badly burned,

In this invention the course; Oftheair is precisely the same a many-knewyp of forced draft furnace fronts particularly of the Scotch type andbriefly it may be pointed'outthat the air is forced in at 60 andhl'above the side Y ilves 36 and 37 respecti'vely and flows" througlr theports opened by said valves into the ashpit and on to the underside ofthe grate in the same manner any air drafti Thetop valve cl'osesports tothe air chamber around the fuel passage andsflows, to the baflies, andthrough theholes to the firebox ensternary. V

,iVario'us. changes lnayche macle in the con structlon ofthe severalparts and:ther-r arrangen'ient, so long as they remainwithin the other,a crank shaft journaledi in the upper portionof said frontplate abovethe I plane of the said valves and havingan operating; handle at itsouter end, a crank on said crankshaft, a rod: extendingdownward-1y fromthe crank andoperatively' connected to the same andsto one ofthe valvesfor opening andclosingr' the latter, a door closing" the frontendof' thesaid passage,

a latch bar pivotally secured on said door,

and a stop rigid with the-crank shaft and movable to: and from aposition in. front of the latch bar and arrangedto; loclnthe latch" barcoincidentally with: the opening of -the valves; a

2. In a furnace front and valve mochanis1n therefor, a mainframecoinprirsinga front plate, a back plate, a fuel" passage 'wallspacing and connecting said plates: and

an ash pitvflare, plates forming; air passages to the ashpit,"avalve-shaftvjour nal'ed'below said passagewall, valves,vfilir'edly mounted on said shaft andwith said passage 7 wall dividingtheinterior of the frontinto upper and lower portions, fuel door,- a latchbar for said fueldoor, a crankshaft journaled inthe front p latc abovethe plane of said valves, I cranks, mounted the crank shaft andthe'valve' shaft, a rod" operatively= connecting the sai-dn cranks foroz zrenin-g closing; the valves, an" operating handle mounted: on thecrankshaft; and

a: rotating stop, carried by the crankshaft andengaging:andidisengagings'the latch bar: and arranged to 1GOk l1hG'latch barzwhen the valves arcqopen andreleasethe latch bar when thevalves are closed? f I 3; In a furnace frontfanclj nism therefor, a mainframe com rising a frontplate, a back plate-and a uelp'ass sagevwall'havin g a fuel passage, adoorto" said; passage, a latch bar mountedon said door, a lotatable'stop engaging the latch 'Ibarfa square shaftextending inwardly through the front plate and carrying the said stopand provided with a handle, a

bushing mounted on said shaft and jourt1vely' connected with one of thevalves,

and a rodconnecting thecranks' for opening and closing-the valves, thesaid stow being arranged to engage the latch bar when. I H the valvesareopen and to release the latch V 'barwhenthe valves' are closed. g 4. Inafurna'c e front'and valve-{rriechanism therefor, a main frame comprisinga and 't'e val've shaft. 1

,jfrontfliilate,jfa hacki platega .fuel pas age Qwall, having "a fuel,lpassage', said plates [forming-air passage's to the ash pit, a doorclosing said] fuel' pas'sage, a latch bar 'mounted on said door, a valveshaft journa1edbelowsaid fuel passage, valvesnio'untg {ed on said shaftand operatin in the air passages, a. square crank sha t journaled in thefront plate aboveivthe plane'of the" valve and adjacent and in proximityto said latch bar, a stop carried by the crank shaft and movable ,into.and foutof engagement s r .with the latch b ar and arrangedto lock thelatch bar when the valves are open'and to;

release" the latch bar when the valves are closed, a crank mounted onsaid. crank shaft,

spring between said nut. and crank, and a rod-o eratively connecting thecrankshaft si ed at NewfYork city this 29th day of O0t0131918fi I 1JOH-N- REID.

7 40 a-nut screw threaded on the crank shaft; a

